duplex Board paper
grey back (one side coated)
white back(two side coated)
GRADE AA
Basis Weight |
GSM |
230 |
250 |
300 |
350 |
400 |
450 |
500 |
Weight Range |
(gsm) |
±10 |
±10 |
±10 |
±10 |
±10 |
±10 |
±10 |
Thickness |
(m/m) |
0.28±0.02 |
0.31±0.02 |
0.37±0.03 |
0.43±0.02 |
0.5±0.02 |
0.56±0.02 |
0.62±0.02 |
Density |
(g/cm3) |
≤0.8 |
≤0.8 |
≤0.8 |
≤0.8 |
≤0.8 |
≤0.8 |
≤0.8 |
Moisture |
(%) |
5.8±1.0 |
6±1.0 |
6.5±1.0 |
7±1.0 |
7.5±1.0 |
8.0±1.0 |
8.5±1.0 |
Gloss |
(%) |
85 |
85 |
85 |
85 |
85 |
85 |
85 |
Brightness,Whiteness |
(%) |
≥82 |
≥82 |
≥82 |
≥82 |
≥82 |
≥82 |
≥82 |
Smoothness |
(s) |
≥100 |
≥100 |
≥100 |
≥100 |
≥100 |
≥100 |
≥100 |
Coating Weight |
(g/m2) |
36 |
35 |
35 |
35 |
35 |
35 |
35 |
Dispersion of basic weight at landscape orientation |
(%) |
6.8 |
7.0 |
7.5 |
8.0 |
8.5 |
9.0 |
9.5 |
Sizing |
(g/m2) |
15-20 |
15-20 |
15-20 |
15-20 |
15-20 |
15-20 |
15-20 |
Stiffness Taber(MD) |
(mN.m) |
≥2.1 |
≥2.9 |
≥4.1 |
≥6.3 |
≥9.0 |
≥12.1 |
≥15.6 |
Stiffness Taber(CD) |
(mN.m) |
≥13.5 |
≥14.5 |
≥17.1 |
≥20.0 |
≥24.8 |
≥30.1 |
≥36.5 |
Folding endurance |
(times) |
≥10 |
≥10 |
≥10 |
≥10 |
≥10 |
≥10 |
≥10 |
Absorption capability of ink |
(%) |
18-23 |
18-23 |
18-23 |
18-23 |
18-23 |
18-23 |
18-23 |